Status Indicators - Koden MDC-1840BB Operation Manual

Chapter 8
Trouble Shooting And On Board Servicing
(Alarm messages)
Alarm messages
RADAR VIDEO ABNORMAL
GYRO HDG XXX
LOG SPD XXX

8.2.2 Status indicators

Two LEDs (Light Emitting Diodes) are provided on the Logic board fitted inside the
display unit. These LEDs indicate the operational status of the software and hardware
used in this system. Details of the indications are as follows:
Table 8.2 Status indications
LED No. Usage
DS1 Software check
DS2 Hardware check
Location of the status indicators
Battery
8-2
MDC-1840BB/1841BB/1860BB/1810BB/1820BB Series
Faults detected
Video signal sent from the transceiver unit is
erratic or not present at all.
No bearing data is applied to the display unit.
No bearing data is applied to the display unit
Operational status
Normal
Failure
Normal
Failure
U25
DS2
U18
DS1
U21
LOGIC BOARD
E47-700A
Figure 8.1 Location of status indicators
LED status
Status indicators
U57
U37
Line Filter
Operation Manual
ON
OFF
ON
OFF
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